+/**
+ * it821x_display_disk - display disk setup
+ * @n: Device number
+ * @buf: Buffer block from firmware
+ *
+ * Produce a nice informative display of the device setup as provided
+ * by the firmware.
+ */
+
+static void it821x_display_disk(int n, u8 *buf)
+{
+ unsigned char id[41];
+ int mode = 0;
+ char *mtype;
+ char mbuf[8];
+ char *cbl = "(40 wire cable)";
+
+ static const char *types[5] = {
+ "RAID0", "RAID1" "RAID 0+1", "JBOD", "DISK"
+ };
+
+ if (buf[52] > 4) /* No Disk */
+ return;
+
+ ata_id_c_string((u16 *)buf, id, 0, 41);
+
+ if (buf[51]) {
+ mode = ffs(buf[51]);
+ mtype = "UDMA";
+ } else if (buf[49]) {
+ mode = ffs(buf[49]);
+ mtype = "MWDMA";
+ }
+
+ if (buf[76])
+ cbl = "";
+
+ if (mode)
+ snprintf(mbuf, 8, "%5s%d", mtype, mode - 1);
+ else
+ strcpy(mbuf, "PIO");
+ if (buf[52] == 4)
+ printk(KERN_INFO "%d: %-6s %-8s %s %s\n",
+ n, mbuf, types[buf[52]], id, cbl);
+ else
+ printk(KERN_INFO "%d: %-6s %-8s Volume: %1d %s %s\n",
+ n, mbuf, types[buf[52]], buf[53], id, cbl);
+ if (buf[125] < 100)
+ printk(KERN_INFO "%d: Rebuilding: %d%%\n", n, buf[125]);
+}
+
+/**
+ * it821x_firmware_command - issue firmware command
+ * @ap: IT821x port to interrogate
+ * @cmd: command
+ * @len: length
+ *
+ * Issue firmware commands expecting data back from the controller. We
+ * use this to issue commands that do not go via the normal paths. Other
+ * commands such as 0xFC can be issued normally.
+ */
+
+static u8 *it821x_firmware_command(struct ata_port *ap, u8 cmd, int len)
+{
+ u8 status;
+ int n = 0;
+ u16 *buf = kmalloc(len, GFP_KERNEL);
+ if (buf == NULL) {
+ printk(KERN_ERR "it821x_firmware_command: Out of memory\n");
+ return NULL;
+ }
+ /* This isn't quite a normal ATA command as we are talking to the
+ firmware not the drives */
+ ap->ctl |= ATA_NIEN;
+ iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
+ ata_wait_idle(ap);
+ iowrite8(ATA_DEVICE_OBS, ap->ioaddr.device_addr);
+ iowrite8(cmd, ap->ioaddr.command_addr);
+ udelay(1);
+ /* This should be almost immediate but a little paranoia goes a long
+ way. */
+ while(n++ < 10) {
+ status = ioread8(ap->ioaddr.status_addr);
+ if (status & ATA_ERR) {
+ kfree(buf);
+ printk(KERN_ERR "it821x_firmware_command: rejected\n");
+ return NULL;
+ }
+ if (status & ATA_DRQ) {
+ ioread16_rep(ap->ioaddr.data_addr, buf, len/2);
+ return (u8 *)buf;
+ }
+ mdelay(1);
+ }
+ kfree(buf);
+ printk(KERN_ERR "it821x_firmware_command: timeout\n");
+ return NULL;
+}
+
+/**
+ * it821x_probe_firmware - firmware reporting/setup
+ * @ap: IT821x port being probed
+ *
+ * Probe the firmware of the controller by issuing firmware command
+ * 0xFA and analysing the returned data.
+ */
+
+static void it821x_probe_firmware(struct ata_port *ap)
+{
+ u8 *buf;
+ int i;
+
+ /* This is a bit ugly as we can't just issue a task file to a device
+ as this is controller magic */
+
+ buf = it821x_firmware_command(ap, 0xFA, 512);
+
+ if (buf != NULL) {
+ printk(KERN_INFO "pata_it821x: Firmware %02X/%02X/%02X%02X\n",
+ buf[505],
+ buf[506],
+ buf[507],
+ buf[508]);
+ for (i = 0; i < 4; i++)
+ it821x_display_disk(i, buf + 128 * i);
+ kfree(buf);
+ }
+}
+
+